Which policy Miller has allegedly violated was not disclosed as the case is currently in the appeals process. The Denver Post reported it was for a violation of the drug policy. The Post said Miller had tested positive for marijuana and amphetamines as a rookie in 2011.

Miller denied any knowledge of the suspension or wrongdoing with a statement on Twitter.

Seeing reports abt 4 game susp. I know I did nothing wrong. I'm sure this'll be resolved fairly. Disapp. Broncos have 2 open camp like this.

Losing Miller for any stretch of time would be disastrous for the Broncos defense, which also lost defensive end Elvis Dumervildue to a fax machine error earlier this offseason. Miller and Dumervil combined for 29.5 of the Broncos' league-leading 52 sacks last season.

A suspension of Miller would also be another issue the Broncos have to deal with during training camp. Last week, the Broncos suspended personnel executives Tom Heckert and Matt Russell after the pair were arrested on suspicion of DUI charges this offseason.

Miller has gone to back-to-back Pro Bowls since being selected with the No. 3 overall pick of the 2011 NFL draft. Miller had 11.5 sacks in earning NFL Defensive Rookie of the Year honors and was a first-team All-Pro after posting 18.5 sacks in 2012.

If Miller is suspended, the four-game absence would cost Miller $537,441 of his $2.284 million base salary this season, as well as over $200,000 from his $13.773 million signing bonus that the Broncos could seek to recoup due to the suspension.